In the almost 3 years I've owned my 17-55mm lens, it has zero visible dust. It is the only lens i keep a filter on, just because of the stories. I also have a 24-105, and its good on a crop camera, but not wide enough. My 17-55mm IS lived on my 40D until I sold it last week.


I'll sell it now, but do not regret buying it and using it for almost 3 years. I won't lose much if any money selling it, since prices have went up on new ones. I also have a 17-40mm thatI bought for my FF. It takes nice images on my 5D MK II, but never gets used on my 40D, the 17-55 is much better.